1. 下载链接

https://www.oracle.com/java/technologies/javase/javase8u211-later-archive-downloads.html

点击下载jdk-8uXXX-linux-x64.tar.gztar.gz压缩包

2. 安装

通过终端在/usr/local目录下新建java文件夹

sudo mkdir /usr/local/java

上传文件到Java文件夹之后解压

tar -zxvf jdk-8uXXX-linux-x64.tar.gz

3. 配置Jdk环境变量

sudo vi /etc/profile

在文件末尾追加

export JAVA_HOME=/usr/local/java/jdk1.8.0_XXX
 
export JRE_HOME=${JAVA_HOME}/jre
 
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
 
export PATH=${JAVA_HOME}/bin:$PATH

保存后，重新加载生效

source /etc/profile

4. 验证

java -version

输出此内容表示配置成功

java version "1.8.0_XXX"
Java(TM) SE Runtime Environment (build 1.8.0_XXX-b10)
Java HotSpot(TM) 64-Bit Server VM (build 25.XXX-b10, mixed mode)